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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/alpha/oprofile/op_model_ev6.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/alpha/oprofile/op_model_ev6.c')
-rw-r--r-- | kernel/arch/alpha/oprofile/op_model_ev6.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/kernel/arch/alpha/oprofile/op_model_ev6.c b/kernel/arch/alpha/oprofile/op_model_ev6.c new file mode 100644 index 000000000..02edf5971 --- /dev/null +++ b/kernel/arch/alpha/oprofile/op_model_ev6.c @@ -0,0 +1,101 @@ +/** + * @file arch/alpha/oprofile/op_model_ev6.c + * + * @remark Copyright 2002 OProfile authors + * @remark Read the file COPYING + * + * @author Richard Henderson <rth@twiddle.net> + */ + +#include <linux/oprofile.h> +#include <linux/smp.h> +#include <asm/ptrace.h> + +#include "op_impl.h" + + +/* Compute all of the registers in preparation for enabling profiling. */ + +static void +ev6_reg_setup(struct op_register_config *reg, + struct op_counter_config *ctr, + struct op_system_config *sys) +{ + unsigned long ctl, reset, need_reset, i; + + /* Select desired events. We've mapped the event numbers + such that they fit directly into the event selection fields. */ + ctl = 0; + if (ctr[0].enabled && ctr[0].event) + ctl |= (ctr[0].event & 1) << 4; + if (ctr[1].enabled) + ctl |= (ctr[1].event - 2) & 15; + reg->mux_select = ctl; + + /* Select logging options. */ + /* ??? Need to come up with some mechanism to trace only + selected processes. EV6 does not have a mechanism to + select kernel or user mode only. For now, enable always. */ + reg->proc_mode = 0; + + /* EV6 cannot change the width of the counters as with the + other implementations. But fortunately, we can write to + the counters and set the value such that it will overflow + at the right time. */ + reset = need_reset = 0; + for (i = 0; i < 2; ++i) { + unsigned long count = ctr[i].count; + if (!ctr[i].enabled) + continue; + + if (count > 0x100000) + count = 0x100000; + ctr[i].count = count; + reset |= (0x100000 - count) << (i ? 6 : 28); + if (count != 0x100000) + need_reset |= 1 << i; + } + reg->reset_values = reset; + reg->need_reset = need_reset; +} + +/* Program all of the registers in preparation for enabling profiling. */ + +static void +ev6_cpu_setup (void *x) +{ + struct op_register_config *reg = x; + + wrperfmon(2, reg->mux_select); + wrperfmon(3, reg->proc_mode); + wrperfmon(6, reg->reset_values | 3); +} + +/* CTR is a counter for which the user has requested an interrupt count + in between one of the widths selectable in hardware. Reset the count + for CTR to the value stored in REG->RESET_VALUES. */ + +static void +ev6_reset_ctr(struct op_register_config *reg, unsigned long ctr) +{ + wrperfmon(6, reg->reset_values | (1 << ctr)); +} + +static void +ev6_handle_interrupt(unsigned long which, struct pt_regs *regs, + struct op_counter_config *ctr) +{ + /* Record the sample. */ + oprofile_add_sample(regs, which); +} + + +struct op_axp_model op_model_ev6 = { + .reg_setup = ev6_reg_setup, + .cpu_setup = ev6_cpu_setup, + .reset_ctr = ev6_reset_ctr, + .handle_interrupt = ev6_handle_interrupt, + .cpu_type = "alpha/ev6", + .num_counters = 2, + .can_set_proc_mode = 0, +}; |